If the load is not fully against the heel of the fork arm, how will this affect the operation of the forklift?

• A. Load is easier to remove
• B. Mast height remains constant
• C. Stability and capacity is reduced
• D. Operation is unaffected

Answer: (C)

Position of the load relative to the fork heel is what determines the load’s center of gravity in relation to the forklift’s stability. When the load isn’t pressed fully against the heel, the center of gravity moves forward from the forks, increasing the tipping moment on the forklift. Since the rated capacity is specified for a standard load center distance, moving the load forward effectively reduces the usable capacity. The forward shift also narrows the stability margin defined by the stability triangle, making the machine more prone to tipping, especially when lifting, tilting, or turning. So the operation becomes less stable and the available capacity is decreased.